Semi 5th wheels don’t have side tilt. It’s more stable in crosswinds and buffeting from other vehicles. But semis generally aren’t concerned with trailer/truck frame flex. Pickups and 5vers aren’t designed as heavy duty and the mfgs are actually taking flex out of the truck frames and flexing tears apart an RV,slowly.
Having that option on a rv is a good thing, when you need it and a minor hindrance when you don’t want it. That’s why trailers that go off road more, like flat decks and stock trailers are GN. So they pivot.